Product Overview

p-Toluene Sulphonic Acid Monohydrate 98% For Synthesis (CAS No. 6192-52-5) is the monohydrate of 4-methylbenzenesulphonic acid, a strong aromatic sulphonic acid combining high Brønsted acidity with an organic aromatic framework. Its sulphonic-acid group readily protonates suitable substrates and forms sulphonate salts, while the para-methyl substituent distinguishes it from other toluenesulphonic-acid positional isomers. The monohydrate state is integral to the exact catalogue identity.

The Synthesis grade is intended for acid-catalysed organic transformations, preparation of p-toluenesulphonate salts and general preparative chemistry. Its strong organic acidity is particularly useful in esterification, acetalisation, condensation, dehydration and other transformations requiring a soluble non-oxidising Brønsted acid catalyst.

Typical Applications

• Acid catalyst in esterification reactions.
• Acetalisation and ketalisation of suitable carbonyl compounds.
• Acid-catalysed condensation and dehydration chemistry.
• Preparation of p-toluenesulphonate salts.
• Catalysis of compatible polymer and resin-forming reactions.
• General preparative organic synthesis requiring a strong organic acid.

Common Synonyms

• 4-Methylbenzenesulphonic acid monohydrate
• p-Toluenesulfonic acid monohydrate
• PTSA monohydrate

Storage Conditions

Store tightly closed and protect from uncontrolled moisture exchange so that the monohydrate composition remains suitable for reproducible preparation. Prevent alkaline contamination that could partially neutralise the sulphonic acid.